EP1054371B1 - Automatic alertsystem for vehicles - Google Patents

Automatic alertsystem for vehicles Download PDF

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Publication number
EP1054371B1
EP1054371B1 EP20000106898 EP00106898A EP1054371B1 EP 1054371 B1 EP1054371 B1 EP 1054371B1 EP 20000106898 EP20000106898 EP 20000106898 EP 00106898 A EP00106898 A EP 00106898A EP 1054371 B1 EP1054371 B1 EP 1054371B1
Authority
EP
European Patent Office
Prior art keywords
emergency call
characterized
motor vehicle
relative speed
vehicle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP20000106898
Other languages
German (de)
French (fr)
Other versions
EP1054371A1 (en
EP1054371B2 (en
Inventor
Hans-Wilhelm Dr. Rühl
Jauke Van Roekel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
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Siemens AG
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Filing date
Publication date
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Priority to DE1999122730 priority Critical patent/DE19922730A1/en
Priority to DE19922730 priority
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Publication of EP1054371A1 publication Critical patent/EP1054371A1/en
Application granted granted Critical
Publication of EP1054371B1 publication Critical patent/EP1054371B1/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7908371&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1054371(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Publication of EP1054371B2 publication Critical patent/EP1054371B2/en
Application status is Expired - Fee Related legal-status Critical
Anticipated expiration legal-status Critical

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    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/20Monitoring the location of vehicles belonging to a group, e.g. fleet of vehicles, countable or determined number of vehicles
    • G08G1/205Indicating the location of the monitored vehicles as destination, e.g. accidents, stolen, rental

Description

The invention relates to an emergency call system of a motor vehicle with a Motor vehicle present transmitter for the automatic transmission of a Emergency calls to an external receiving station and a signal generator, wherein the transmitter and the signal transmitter are connected to a computing unit, the emergency call when there is a corresponding signal from the signal generator activated, as well as a method for the automatic transmission of a Emergency calls by a transmitter from a motor vehicle to a receiving station.

Such an emergency call system is known from WO 90/03899. Through a An automatic emergency call is triggered by a signal from a signal generator. at the signal transmitter can be an airbag, an alarm system or act a temperature or gas sensor. The system can therefore be dependent from the signaling device used in the event of a collision or theft the vehicle an alarm via a mobile radio device trigger. The emergency call system also contains a navigation device for determination and transmission of the position of the vehicle together with the emergency call. The emergency call can provide additional information such as vehicle-specific data, vehicle type, dangerous goods class, the phone number, an accident report, a fire warning and the number of Vehicle occupants are transmitted. This system is disadvantageous however, that in the event of a collision, the emergency call device will be damaged can and therefore possibly is inoperable. As a result, the Emergency call can no longer be sent.

The object of the invention is therefore to provide an emergency call system that this Avoids disadvantage and ensures a safe transmission of the emergency call. Another object of the invention is a method for the automatic transmission of an emergency call from a motor vehicle to specify a receiving station.

The first-mentioned task is in a generic emergency call system solved in that the emergency call means for determining a degree of probability for an impending accident with the signals of the signal generator and the emergency call when a limit value is exceeded can be activated for the degree of probability.

In particular, the emergency call system contains a signal generator with the computing unit connected measuring means for determining the relative speed and the distance of the motor vehicle to another vehicle or an obstacle, a comparison between the with the measuring means determined relative speed and a maximum permissible value of the relative speed at the measured distance is feasible and the emergency call when the maximum permissible is exceeded Relative speed can be activated at a given distance. The emergency call is therefore already before an accident or a collision of the Motor vehicle can be activated with another vehicle or an obstacle.

The inventive method is characterized in that the Distance and the relative speed of the motor vehicle to one other vehicle or an obstacle is determined, the determined relative speed with a specified maximum permissible relative speed for the determined distance is compared and an emergency call is triggered when the determined relative speed of the motor vehicle exceeds the specified maximum permissible relative speed.

In the known emergency call system described above, the emergency call only transmitted when a collision is registered by a sensor becomes. The airbag signal is used for this purpose, for example. In contrast this can be done with the emergency call system according to the invention before it occurs the collision can be determined that this can no longer be prevented. As a result, the emergency call can therefore also occur before the collision occurs be activated, i.e. at a time when the emergency call system is still is functional. For this, the relative speed of the motor vehicle to another vehicle or an obstacle as well like the distance of the motor vehicle to the other vehicle or obstacle. Exceeds the relative speed at a given distance a predetermined value, it can be assumed that a collision is inevitable.

At any distance from the motor vehicle to another vehicle or An obstacle is therefore a maximum permissible limit for the relative speed established. This limit can be set in the computing unit determined via an equation for the respective distance become. However, it is also possible to have several pairs of values, one each Distance and an associated maximum permissible relative speed store in a storage element, the storage element is connected to the computing unit. The computing unit calls then the pairs of values closest to the current distance from and uses interpolation to determine the maximum permissible value Relative speed of the vehicle.

Furthermore, various such limit values for the maximum allowable Relative speed must be present. These can, for example take the road surface into account. So is with dry Roadway, for example, a higher limit value is permissible than in the wet Road or snow-covered road. To determine the condition of the road Appropriate sensors must be available in the vehicle his. For example, can be optically via the Road surface reflected light portion between dry and wet road be distinguished.

Although in principle it is also possible to send an emergency call Locating a motor vehicle is preferably carried out together with the emergency call Vehicle position transmitted to the receiving station. This is in the driving in particular a navigation system known per se is provided, the position determination both via satellite navigation (GPS navigation) as well as via dead reckoning in a known manner can. Of the various functions of a navigation system is for the emergency call system only the position determination of importance, not however the route calculation. It is therefore sufficient, for example instead of a full navigation system, just one Use receiver with evaluation unit for GPS navigation.

To prevent false alarms, is in a special embodiment provided that the computing unit of the emergency call system with is at least one sensor for detecting an accident. The emergency call system also contains a timer connected to the computing unit (Timer) that starts when the emergency call is activated. Lies to No time signaling a collision when the timer expired the sensor, the emergency call is automatically canceled.

If a driver succeeds, for example, despite being above the limit to drive around an obstacle and thus to avoid a collision, the revocation of the Emergency calls avoided alerting assistants. With the sensor Accident detection can be, in particular, an acceleration sensor or be a temperature sensor. Because acceleration sensors already available to trigger the airbag in motor vehicles are, it is particularly advantageous if the emergency call system with these connected is. If the airbag does not run until the timer expires triggered, it is assumed that no collision has occurred and the emergency call is canceled. Not to revoke the emergency call Depending on the signal of a single sensor, several can Sensors are present. In the presence of a temperature sensor In particular, a vehicle fire can also be registered.

To activate a sufficient number of rescue workers, is in one preferred embodiment further provided that the computing unit the emergency call system is connected to seat occupancy sensors, so that with the number of occupied motor vehicle slots are transmitted to the emergency call can.

An essential part of the emergency call system according to the invention are the measuring means for determining the relative speed and the distance of the motor vehicle from another vehicle or one Obstacle. These measuring means are preferably based on the evaluation a transmitted and received reflected radar signal. Such Radar systems are not yet standard in motor vehicles used, but they are known to the person skilled in the art. In Valais, among others: Electronics in the automotive industry, 2nd edition, expert-Verlag, Renningen-Malsheim 1997, pages 308 to 331, the use of radar systems for distance warning and distance control in motor vehicles. Radar systems have optical or acoustic methods the advantage that the damping by rain and fog is low. As possible frequencies are given 35 GHz and 78 GHz.

Furthermore, a computerized radar method is described in WO 94/16340 for measuring distances and relative speeds between one Vehicle and obstacles in front of it described. in this connection radar signals are emitted by another vehicle or an obstacle. The reflected radar signals are in turn collected and evaluated. The relative speed between the motor vehicle in which the system is located and another vehicle or obstacle due to the Doppler shift the frequency of the emitted and reflected signal. Since the radar signal is emitted in pulses, the Runtime of the pulse the distance between the motor vehicle and the the vehicle or obstacle reflecting the radar pulse. For a safe distinction between actual obstacles and For example, apparent obstacles can be found in the aforementioned patent application described procedures are used.

Any known radio system can be used to transmit the emergency call. To ensure a safe transmission of the emergency call, this should however, be available nationwide. Because of the already very wide Distribution of mobile radio systems in Europe based on the GSM standard are based, these systems as well as systems according to newer UMTS standard particularly preferred there. It can be for example, the known D and E networks. Appropriate Systems are well known to the person skilled in the art and are also suitable for use introduced in the motor vehicle, so that they are not described here Need to become.

The invention is explained in more detail below using an exemplary embodiment and the drawing. Show it

Figure 1:
the essential components of the emergency call system,
Figure 2:
the components of a radar system,
Figure 3:
the components of a navigation system,
Figure 4:
the course of the procedure,
Figure 5:
the sequence of the procedure for avoiding false alarms in the receiving station.

The emergency call system shown in Figure 1 contains the central element Computing unit 1, which consists of a microcomputer and associated storage elements and interfaces exist. With the computing unit 1 is a Radar system 2 connected in the manner described above Relative speed of the motor vehicle and the distance to one other vehicle or obstacle. Furthermore, the computing unit connected to a mobile phone 3. In a memory element of the computing unit 1 is a determination equation filed for calculation a limit of the maximum permissible relative speed given distance. The current distance of the motor vehicle from one The radar system 2 passes the obstacle to the computing unit 1 transmitted. On the basis of this distance value, the computing unit 2 the permissible limit for the relative speed is determined. The of the radar system 2 also transmitted current to the computing unit 1 Relative speed is compared to this limit. Is the current one Relative speed of the motor vehicle greater than the limit value, it is assumed that a collision is unavoidable. In this The arithmetic unit 1 makes an emergency call through the mobile phone 3 transmitted to a receiving station, not shown. To make the emergency call at the same time the position of the motor vehicle at the receiving station To be able to transmit, the computing unit 1 is still with a Navigation system 4 connected.

In addition, the computing unit 1 is connected to a timer (Timer) 5. When the emergency call is activated by the computing unit 1 at the same time timer 5 started. The runtime of the timer is typically just a few seconds. Computing unit 1 is also included connected to the airbag system 6 of the motor vehicle. Finds a collision of the motor vehicle with the obstacle, at least one airbag triggered. The deployment of the airbag is registered in the computing unit 1. If the timer 5 expires, there is no signal in the computing unit 1 that signals that the airbag is deployed, it is assumed that there was no collision. In this case, by the computing unit 1 activates a further radio call via the mobile telephone 3 or the still existing connection used to revoke the To transmit emergency calls.

In Figure 2 are the known components of a radar system to determine the relative speed and the distance in simplified Block form shown. The radar system includes one High-frequency part 7 and a signal processing part 8. In the high-frequency part 7, a pulsed microwave signal is generated, which via a Transmitting / receiving antenna 9 is transmitted. The microwave signal is reflected on a preceding vehicle 10. The reflected Part is partially caught by the transmitting / receiving antenna 9 and again supplied to the high-frequency part 7. Be in the high frequency part the transmit signal and the received reflected signal are separated and fed separately to a mixer. In the signal processing part 8 a Analog / digital conversion performed and then the digital signals processed in a signal processor. At an interface 19a the specified distance of the motor vehicle is transferred from preceding vehicle 10 and the relative speed to the computing unit 1 of the emergency call system.

In Figure 3 is a navigation system for determining the vehicle position shown in more detail. Via an operating unit 11 with a microprocessor 12 is connected, settings of system parameters of the Navigation system can be made. For example, the one you want Form of presentation of the information on the display unit 13 to get voted. The destination can also be entered or from a list of possible destinations that are shown on the display unit 13, to be selected. The control unit 11 and the display unit 13 can also be designed as a combined control / display unit. Furthermore, the input and output of information can also be shown in a manner not shown Way via acoustic means of speech input or output. The navigation system also includes a reader 14 with which a CD-ROM 15 or a similar storage medium digitized map data can be read into the microprocessor 12 can.

The microprocessor 12 also includes other components for position determination of the vehicle using dead reckoning and / or GPS navigation connected. It is a GPS receiver 16, which is equipped to receive signals from the GPS satellite system and the position of the vehicle based on the received signals can determine. However, since the GPS signals may in valleys or in Cities are not receivable, the navigation system continues to point a direction sensor 17 and a distance sensor 18 for implementation a dead reckoning. The determined by the navigation system Vehicle position is sent to the computing unit via the interface 19 1 of the emergency call system. The navigation system cannot shown connected to the mobile phone or an audio system be current traffic information from the mobile phone or audio system are transmitted to the navigation system at route planning. In this respect it is a known navigation system. Of the various functions of the Navigation system is only the destination for the emergency call system the vehicle position is important.

In the described embodiment, a radar system, a navigation system and a mobile phone via the computing unit 1 in the invention Linked way. Except in the computing unit 1 are therefore both in the radar system 2 and in the navigation system 4 microprocessors available. In a more integrated embodiment of the Emergency call system according to the invention can the function of this individual Microprocessors, however, also in a common microprocessor be relocated.

FIG. 4 shows an embodiment of the method according to the invention as a flow chart. In the motor vehicle, the distance d and the relative speed V rel of the motor vehicle to a preceding vehicle or an obstacle are continuously determined. The current vehicle position is also continuously determined via the navigation system. The current relative speed of the motor vehicle is compared with the limit value V limit of the relative speed that applies to the current distance of the motor vehicle. If the current relative velocity V rel is greater than the cross-limit speed V at a given distance, so it is assumed that a collision is unavoidable and an emergency call is transmitted. A timer is started at the same time. When the timer expires, it is checked whether a sensor that detects a collision of the motor vehicle, for example the airbag sensor, has been activated. If this is not the case, it is assumed that no collision has taken place and the emergency call is canceled.

In order not even in the receiving station immediately upon receipt of the emergency call 5 is also triggered in the receiving station according to FIG when the emergency call arrives, a timer started because the emergency call is still can be revoked. The runtime of the timer is again only a few Seconds. If the emergency call is canceled by the end of the timer the alarm procedure is terminated without an alarm has already occurred. Was the emergency call by If the timer expires, the alarm will eventually be canceled triggered. Through this procedure, the staff in the receiving station not constantly on alert due to received emergency calls which are subsequently revoked. On the other hand, through the delay of the alarm lasting only a few seconds is not a disadvantage Expected effect.

The emergency call system according to the invention was based on an embodiment described. Since the emergency call system also includes known motor vehicle components, such as a speed and distance measuring system, includes a navigation system and a mobile phone, a variety of embodiments are possible. For example Speed and distance measurement also used an infrared system become. Furthermore, a complete mobile phone is not required. For the emergency call system according to the invention is a transmitter sufficient so that the dial pad, the microphone and the speaker of the mobile phone for the emergency call system according to the invention is not required. For determination the vehicle position is next to the described navigation system For example, a system is also conceivable in which the position is determined by Baaken is transmitted to the vehicle in the vehicle edge.

Claims (18)

  1. Emergency call system for a motor vehicle, having a transmitter (3), provided in the motor vehicle, for automatically transmitting an emergency call to an external receiving station, and having at least one signal generator, the transmitter and the signal generator being connected to an arithmetic and logic unit (1) which activates the emergency call if there is an appropriate signal from the signal generator, characterized in that the emergency call system contains means for determining a probability level for an imminent accident using the signals from the signal generator, and the emergency call is activated if a limit value for the probability level is exceeded.
  2. Emergency call system according to Claim 1, characterized in that the emergency call system contains, as the signal generator, measuring means (2) connected to the arithmetic and logic unit for determining the relative speed and the distance of the motor vehicle in relation to another vehicle (10) or an obstacle, in which case the arithmetic and logic unit (1) can perform a comparison between the relative speed determined using the measuring means (2) and a maximum permissible value for the relative speed at the measured distance, and the emergency call can be activated if the maximum permissible relative speed for a given distance is exceeded.
  3. Emergency call system according to one of the preceding claims, characterized in that means connected to the arithmetic and logic unit for determining the vehicle position (4) are provided and the vehicle position can be transmitted to the receiving station with the emergency call.
  4. Emergency call system according to one of the preceding claims, characterized in that the arithmetic and logic unit is connected to at least one sensor (6) for detecting an accident, and the emergency call system also contains a timer (5) which is connected to the arithmetic and logic unit (1) and is started when the emergency call is activated, and the emergency call can be automatically revoked when the timer (5) has run out if no signal signalling an accident has been transmitted to the arithmetic and logic unit (1) by the sensor (6) by the time the timer (5) has run out.
  5. Emergency call system according to Claim 4, characterized in that the sensor (6) for detecting an accident is an acceleration sensor, particularly for releasing an air bag, or a temperature sensor.
  6. Emergency call system according to one of the preceding claims, characterized in that the arithmetic and logic unit is connected to seat-occupancy sensors, and the number of occupied motor vehicle seats can be transmitted with the emergency call.
  7. Emergency call system according to one of the preceding claims, characterized in that the measuring means for determining the relative speed and the distance are based on the evaluation of a transmitted and received, reflected radar signal.
  8. Emergency call system according to one of the preceding claims, characterized in that the transmitter is an integral part of a mobile communication device, particularly of a digital mobile radio system.
  9. Emergency call system according to Claim 8, characterized in that the mobile radio system is based on the GSM standard or on the UMTS standard.
  10. Emergency call system according to one of the preceding Claims 3 to 9, characterized in that the means for determining the position are a navigation system for the motor vehicle.
  11. Emergency call system according to one of the preceding claims, characterized in that the position of the motor vehicle is determined using dead-reckoning navigation and/or GPS navigation.
  12. Method for automatically transmitting an emergency call from a motor vehicle to a receiving station using a transmitter (3), in which
    the distance and the relative speed of the motor vehicle in relation to another vehicle (10) or an obstacle are ascertained,
    the relative speed ascertained is compared with a defined, maximum permissible relative speed for the distance ascertained, and
    an emergency call is triggered if the particular relative speed of the motor vehicle exceeds the defined, maximum permissible relative speed.
  13. Method according to Claim 12, characterized in that, in addition, the position of the vehicle is determined and the position data is transmitted to the receiving station with the emergency call.
  14. Method according to Claim 14, according to the position of the vehicle is ascertained using dead-reckoning navigation and/or GPS navigation.
  15. Method according to one of the preceding Claims 12 to 14, characterized in that the collision between the motor vehicle and the other vehicle or obstacle is detected by means of a sensor (6), and the emergency call can be automatically revoked if no collision has been detected by the sensor within a predetermined time period after transmission of the emergency call.
  16. Method according to one of the preceding Claims 12 to 15, characterized in that the number of occupied seats in the motor vehicle is transmitted with the emergency call.
  17. Method according to one of the preceding Claims 12 to 16, characterized in that the relative speed and the distance of the motor vehicle are determined using a radar system.
  18. Method according to one of the preceding Claims 12 to 17, characterized in that the emergency call is made using a mobile communication device, in particular a digital mobile radio system.
EP20000106898 1999-05-18 2000-03-31 Automatic alertsystem for vehicles Expired - Fee Related EP1054371B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1999122730 DE19922730A1 (en) 1999-05-18 1999-05-18 Automatic emergency call system for motor vehicles
DE19922730 1999-05-18

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EP1054371B1 true EP1054371B1 (en) 2004-05-19
EP1054371B2 EP1054371B2 (en) 2007-03-21

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EP (1) EP1054371B2 (en)
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Publication number Publication date
EP1054371A1 (en) 2000-11-22
EP1054371B2 (en) 2007-03-21
DE19922730A1 (en) 2000-11-23
US6339370B1 (en) 2002-01-15

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